Thanks for the replies.
They do have a
Clean Cafe service which is 1024/512 but apparently it's
shared between 10 users whereas Dsl-Compax is only shared between 5. It doesn't say that on their website but it says it on the quotation they've just given me. So the extra might not be worth it. Clean Cafe would be quicker at quiet times but might actually be slower at busy times, in theory.
Can either of you possibly
run a speedtest for comparison. I tested on Bangkok, London and LA servers and got around 200 up and 400 down.
Incidentally since we tried to stop with them and change to another ISP they've offered us 1,200 baht a month for DSL Compax 512/256 and 2,000 baht a month for Clean Cafe 1024/512. So I recommend you all threaten to leave and see what discount they offer!